Submission #3400602

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Source Code Expand

#include <bits/stdc++.h>
#define ll long long
using namespace std;

int main() {
//  freopen("in.txt", "r", stdin);
//  freopen("out.txt", "w", stdout);

  string s;
  int k;
  cin >> s >> k;
  int n = s.size();
  vector<string> vv;
  for(int i = 1;i <= 5;i++){
    for(int j = 0;j < n - i + 1;j++){
      vv.push_back(s.substr(j, i));
    }
  }
  sort(vv.begin(), vv.end());
  vv.resize(unique(vv.begin(), vv.end()) - vv.begin());

  cout << vv[k - 1];
  return 0;
}

Submission Info

Judge Result